save project

diy.py

+username="python"
+userpassword="123456"
+while True:
+    name=input("输入账号：")
+    password=input("输入密码：")
+    if name==username and userpassword==password:
+        print("登录成功")
+        break
+    elif name!=username:
+        print("name错")
+        
+    else :
+        print("password错")
+        
+print("欢迎来到贝尔编程!")     
\ No newline at end of file